Sight attachment for guns.



1;; 9338469 R A: r C fimai fi'z'mn H. KORRODI. SIGHT ATTACHMENT FOR GUNS.

APPLICATION FILED APR. 4, 1908. 933,469, Patented Sept. 7, 1909.

H. KORRODI.

SIGHT ATTACHMENT FOR GUNS.

APPLIOATION- TILED APB.4, 1908. v I 933,469, Patented Sept. 7, 1909.

2 SHEETS-SHEET 2.

AKTIENGESELLSCHAFT, OF ESSEN-ON-THE-RUHR, GERMANY.

SIGHT ATTACHMENT FOR GUNS.

Specification of Letters Patent.

Patented Sept. 7, 1909.

Application filed April 4, 1908. Serial No. 425,160.

To all whom it may concern:

Be it known that I, HEINRICH KORRODI, a citizen of Switzerland, and a resident of Essen-on-the-Ruhr, Germany, have invented certain new and useful Improvements in Sight Attachments for Guns, of which the following is a specification.

The present invention relates to sightattachments for guns and particularly to the peculiar arrangement of a sight-attachment having curved attachment-bar on such guns which have their horizontal trunnions located near the breech of the gun-barrel.

In the accompanying drawings, Figure 1 shows a side view of one embodiment of the invention, and some parts of a high-elevation gun, the gun-barrel being in the horizontal position and the sight-attachment being in zero position; Fig. 2 is a view corresponding to Fig. 1 and showing the gun adjusted to a high elevation; Fig. 3 shows a part of Fig. 1 on an enlarged scale, some parts being in section, and Fig. 4 is a rear view of Fig. 3, partly in section.

The gun-barrel A is mounted to slide on the trackcarrier B which by means of horizontal trunnions, of which the drawing (Fig. 4;) shows only one (6), is swingingly mounted in the mount C. The horizontal trunnions of the track-carrier are located in the proximity of the breech of the gun-barrel. Between the mount and the track-carrier is inserted an elevating mechanism, which is not shown in the drawings and which may be of any suitable known construction.

One of the two horizontal trunnions, viz. b is provided with an extension (Fig. 4) which projects beyond the bearing for the trunnion and with which is rigidly connected an arm D which carries the sightattachment of the gun, said sight-attachment comprising a sight-telescope G, a circularly curved attachment-bar H carrying the telescope, and a guiding-box E for said attachment-bar. The guiding box E is swingingly mounted in the arm D which may be termed the sight-attachment carrier through the medium of a trunnion e and a guide-rail c which is curved concentrically to the axis of the trunnion c. The axis of the trunnion 6' extends parallel to the axis of the bore of the gun-barrel. The guiderail 6 is provided with teeth which mesh with a worm F (Fig. 3) journaled in the carrier D and having a hand-wheel f. This swinging arrangement of the guide E, which is old, is for the purpose of making it possible to eliminate the influence of the inclined position of the wheels. A spiral gear N (Fig. 3) having a hand-wheel n and meshing with teeth 71. on the attachment-bar H is journaled in the guide E and serves for adjusting the sight-attachment to the desired elevation. A drum J having its circumference provided with elevation scales 5 (Fig. 1) is journaled in the guide E through the medium of a trunnion i (Fig. 4) The trunnion i has a crown of teeth i which meshes with teeth 72. (Fig. 3) on the attachmentbar. The ratio of transmission of the toothed gear i k and the diameter of the drum J are so selected as to make the elevation. scales 2" capable of being easily read. An index-hand K has an edge to cooperate with the scales 2" and is guided parallel to the axis of the drum J in a projection e on the guide E. By means of a screw M having a hand-wheel m the index-hand K can be adjusted to any one of the scales i. The sightattachn1ent is provided with two levels L and P. The level L is adjustable in the known manner and serves for indirect aiming and for eliminating or measuring the terrain-angle. The other level (P) is used when the influence of the inclined position of the wheels is eliminated.

The attachmentbar H is very highly curved, thereby making it possible to arrange all the parts of the attachment above the trunnion 29 carrying the attachment, in spite of the fact that the concave side 71, (Figs. 1 and 2) of the attachment-bar H is toward the muzzle of the gun-barrel thus making the attachment require the greatest amount of space in the vertical direction. Furthermore the great curvature of the attachment-bar makes it possible to dispose the center of curvature in such a position relatively to the axis of the horizontal trunnions that the sighting line is situated at a normal elevation at any elevation of the gun-barrel.

The small radius of curvature of the attachment-bar does not ermit of easily readable scales being applied to the rod itself and it is therefore necessary to provide the drum J which is positively connected with the attachment-bar and on whose elevation scales z" the elevation can be read by means carrier for said attachment rigidly secured of the index-hand K when the attachment is being adjusted.

It need not be explained how the gun is directed. The advantages resulting from the above described arrangement of the sight-attachment are as follows: As already stated the sighting line has approximately the same elevation, viz. a normal elevation, at all elevations of the gun-barrel, and it is convenient to take aim at any adjustment of the sight-attachment. The improved arrangement of the sight attachment also makes it possible to place the hand-wheel of the elevating mechanism and also the handwheel of the horizontal training mechanism, if any, in direct proximity of the sightattachment, that is to say in a convenient position for being operated by the gunpointer, viz. in the space behind the trunnion Z).

Having thus described the invention, what is claimed and desired to be secured by Letters Patent is:

1. The combination with a gun having its horizontal trunnions located near the breech of the gun-barrel, of a sight-attachment mounted upon and located above one of the horizontal trunnions, and provided with a curved attachment-bar of small radius having its concave side toward the muzzle of the barrel; and a rotating scale-drum adapt ed to move in unison with said attachmentbar to indicate the extent of its movement.

2. The combination with a gun having its horizontal trunnions located near the breech of the gun-barrel; of a sight-attachment; a

to one of the horizontal trunnions; said sightattachment comprising a curved attachmentbar of small radius having its concave side toward the muzzle of the barrel; a sight telescope carried by said attachment-bar; and means for shifting said attachment-bar about its own center of curvature.

3. The combination with a gun provided with horizontal trunnions; 01": a sight-attachment mounted on one of said trunnions, comprising a curved attachment-bar having a radius of curvature less than the distance between its center of curvature and the axis of said trunnions; a sight-telescope carried by said attachment-bar; means for oscillating the attachment-bar about its center of curvature; and a rotating scale-drum in geared relation to said attachment and adapted to indicate the extent of such oscillation.

4. The combination with a portable gun having its horizontal trunnions located near the breech of the gun barrel, of a sight-attachment and a carrier for said attachment; said carrier being rigidly secured to one of the horizontal trunnions and said sightattachment being provided with a curved attachment bar of small radius located above said trunnions and having its concave side toward the muzzle of the barrel.

The foregoing specification signed at Dusseldorf, Germany, this tenth day of February, 1908.

HEINRICH KORRODI. In presence of CARL GRUNWALD, WILHELM FLAsoHE. 

